Improvement in foldingchairs



B. J. HARRISON.

Folding-Chairs.

No. 141,271, Patentedjuly29,1873.

AM. PHDTOi ITHOQRAPH/C 80. N. X l OSBORNE? PRUCESS.

UNITED STATES PATENT QFFIGE.

BENJAMIN J. HARRISON, OF NEW YORK, N. Y.

IMPROVEMENT IN FOLDING CHAIRS.

Specification forming part of Letters Patent No. 141,271, dated July 29,1873; application filed April 1, 1873.

To all whom it may concern:

Be it known that I, BENJAMIN J. HARRI- soN, of the city and State of NewYork, have invented an Improvement in Folding Chair, of which thefollowing is a specification:

Folding chairs are mainly useful in transportation, because, when inuse, the chairs do not usually require to be changed in form; on thecontrary it usually is a disadvantage for a chair to fold, becausesometimes such chairs are not firm when in use.

My present invention is made for allowing portions of the chair to besufficiently disconnected for folding into a small compass fortransportation, and for securely holding the parts when repositioned oropened out.

1 make use of X-legs, one pair extending up to form the back, and theother pairsustaining the front edge of the seat; and at the points ofintersection the respective legs are lap-jointed, and secured by across-rail with right-and-left-handed screws, so that, by revolving thecross-rail, the legs will either be clamped together firmly, or else thelapped joints will be sufficiently relieved or opened to allow of thelegs being turned into line with each other.

In the drawing, Figure 1 is aside elevation of the chair, and Fig. 2 isasection vertically of the cross-rail and legs.

The legs a a extend sufficiently above the seat I) to make the sides ofthe back a, and the front legs d d are connected to the front edge orangles of the seat b by a cross-bolt or hinges. The back portion of theseat I) is sustained by the flexible back 0, or else rests upon supportsthat bear upon the cross-rail d, or rest upon projections from the legsa. The legs a and d are lap-jointed or halvedone leg passing into arecess of the next, and the shoulders of the recess bearing against thesides of the other leg. Thereby the-int rsection is made very firm whenthe parts are drawn tightly together. The cross-rail d is made withrightand-left-handed nuts, recessed in the rail, or

with screw-threads in the rail itself and these.

take similarly-formed screws that pass through the legs and such screwsform the pivots upon which the legs turn when they are folded. It will,however, be evident that the legs cannot be turned until the or )ss-railis unscrewed sufficiently to allow the recesses and legs to beseparated.

I claim as my invention- 1. The cross-legs, recessed at the intersections, and secured by right-and-left-handed bolts and nuts, incombination with the crossrail d, that can be rotated to clamp orrelease the parts, substantially as set forth.

2. The cross-legs, recessed at the intersections, and secured togetherby a screw bolt or bolts, in combination with the chair-bottom I),connected to the upper ends of the front legs by a cross-bolt or hinge,substantially as set forth.

Signed by me this 25th day of March, A. D.

B. J. HARRISON.

Witnesses GEo. T. PINCKNEY, CHAS. H. SMITH.

